Recombination rate variation shapes barriers to introgression across butterfly genomes

PLoS Biology, Journal Year: 2019, Volume and Issue: 17(2), P. e2006288 - e2006288

Published: Feb. 7, 2019

Hybridisation and introgression can dramatically alter the relationships among groups of species, leading to phylogenetic discordance across genome between populations. Introgression also erode species differences over time, but selection against at certain loci acts maintain postmating barriers. Theory predicts that barriers made up many throughout should lead a broad correlation recombination rate, which determines extent on deleterious foreign alleles will affect neutral physically linked loci. Here, we describe variation in genealogical three Heliconius butterflies: H. melpomene (mel), cydno (cyd), timareta (tim), using whole genomes 92 individuals, ask whether this be explained by heterogeneous introgression. We find vary predictably chromosomal scale. By quantifying rate admixture proportions, then show rates are predicted rate. This implies highly polygenic, with acting introgressed most genome. In addition, long chromosomes, have lower rates, produce stronger average than short chromosomes. Finally, consistent difference two pairs either side Andes, suggests architecture Our findings illustrate how combined effects hybridisation, recombination, natural selection, multitudes periods, sculpt species.

Language: Английский

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Genome sequence of Gossypium herbaceum and genome updates of Gossypium arboreum and Gossypium hirsutum provide insights into cotton A-genome evolution

Nature Genetics, Journal Year: 2020, Volume and Issue: 52(5), P. 516 - 524

Published: April 13, 2020

Abstract Upon assembling the first Gossypium herbaceum (A 1 ) genome and substantially improving existing arboreum 2 hirsutum ((AD) genomes, we showed that all A-genomes may have originated from a common ancestor, referred to here as A 0 , which was more phylogenetically related than . Further, allotetraploid formation shown preceded speciation of Both evolved independently, with no ancestor–progeny relationship. Gaussian probability density function analysis indicates several long-terminal-repeat bursts occurred 5.7 million years ago less 0.61 contributed compellingly A-genome size expansion, evolution. Abundant species-specific structural variations in genic regions changed expression many important genes, led fiber cell improvement (AD) Our findings resolve controversial concepts surrounding origins provide valuable genomic resources for cotton genetic improvement.

Language: Английский

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Complex modular architecture around a simple toolkit of wing pattern genes

Nature Ecology & Evolution, Journal Year: 2017, Volume and Issue: 1(3)

Published: Jan. 27, 2017

Language: Английский

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Interpreting the genomic landscape of introgression

Current Opinion in Genetics & Development, Journal Year: 2017, Volume and Issue: 47, P. 69 - 74

Published: Sept. 18, 2017

Introgression, the transfer of genetic material between species through hybridisation, occurs in many taxa and has important consequences. Genomic studies allow us to characterise landscape introgression across genome, shedding light on both its adaptive benefits incompatibilities that help maintain barriers. Studies taking a genome-wide view suggest may be common, but introgressed variation is selected against throughout much genome. Confounding factors can complicate interpretations from these data, computational simulations have proved vital illustrate expected patterns under different scenarios. Future developments will move beyond correlative evidence explicit models account for how selection drift influence variation.

Language: Английский

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Cycles of fusion and fission enabled rapid parallel adaptive radiations in African cichlids

Science, Journal Year: 2023, Volume and Issue: 381(6665)

Published: Sept. 28, 2023

Although some lineages of animals and plants have made impressive adaptive radiations when provided with ecological opportunity, the propensities to radiate vary profoundly among for unknown reasons. In Africa's Lake Victoria region, one cichlid lineage radiated in every lake, largest radiation taking place a lake less than 16,000 years old. We show that all its guilds evolved situ. Cycles fusion through admixture fission speciation characterize history radiation. It was jump-started several swamp-dwelling refugial populations, each which were older hybrid descent, met newly forming where they fused into single population, resuspending old variation. Each population contributed different set ancient alleles from new assembled record time, involving additional fusion-fission cycles. argue repeated cycles make fast predictable.

Language: Английский

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Hybrid speciation driven by multilocus introgression of ecological traits

Nature, Journal Year: 2024, Volume and Issue: 628(8009), P. 811 - 817

Published: April 17, 2024

Abstract Hybridization allows adaptations to be shared among lineages and may trigger the evolution of new species 1,2 . However, convincing examples homoploid hybrid speciation remain rare because it is challenging demonstrate that hybridization was crucial in generating reproductive isolation 3 Here we combine population genomic analysis with quantitative trait locus mapping species-specific traits examine a case Heliconius butterflies. We show elevatus sympatric both parents has persisted as an independently evolving lineage for at least 180,000 years. This despite pervasive ongoing gene flow one parent, pardalinus , which homogenizes 99% their genomes. The remaining 1% introgressed from other melpomene scattered widely across H. genome islands divergence These contain multiple are under disruptive selection, including colour pattern, wing shape, host plant preference, sex pheromones mate choice. Collectively, these place on its own adaptive peak permit coexistence parents. Our results driven by introgression ecological traits, possible multilocus genetic architecture.

Language: Английский

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Supergene Evolution Triggered by the Introgression of a Chromosomal Inversion

Current Biology, Journal Year: 2018, Volume and Issue: 28(11), P. 1839 - 1845.e3

Published: May 24, 2018

Language: Английский

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Evolutionary genomics of anthroponosis in Cryptosporidium

Nature Microbiology, Journal Year: 2019, Volume and Issue: 4(5), P. 826 - 836

Published: March 4, 2019

Language: Английский

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Pervasive population genomic consequences of genome duplication in Arabidopsis arenosa

Nature Ecology & Evolution, Journal Year: 2019, Volume and Issue: 3(3), P. 457 - 468

Published: Feb. 25, 2019

Language: Английский

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Genomics of Parallel Ecological Speciation in Lake Victoria Cichlids

Molecular Biology and Evolution, Journal Year: 2018, Volume and Issue: 35(6), P. 1489 - 1506

Published: March 29, 2018

The genetic basis of parallel evolution similar species is great interest in evolutionary biology. In the adaptive radiation Lake Victoria cichlid fishes, sister with either blue or red-back male nuptial coloration have evolved repeatedly, often associated shallower and deeper water, respectively. One such case red-backed Pundamilia species, for which we recently showed that a young pair may through "hybrid speciation". Coalescent simulations suggested older P. pundamilia (blue) nyererei (red-back) admixed Mwanza Gulf new "nyererei-like" "pundamilia-like" from population. Here, use genome scans to study genomic architecture differentiation, assess influence hybridization on younger pair. For each two pairs, find over 300 regions, widespread across genome, are highly differentiated. A subset most strongly differentiated regions also These shared show allele frequency differences, consistent hypothesis admixture-derived alleles were targeted by divergent selection hybrid However, two-thirds between not suggesting independent responses pressures. Our analyses reveal how variation can facilitate speciation events.

Language: Английский

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